I have recently tested a
Waterless wash as well, and I have to admit (At least the one i have tested) it has what I believe to be a considerable amount of lubricating agents/surfactants in it which help in safer soil elimination/removal. It also leaves the surface pretty dad gum slick. It is a Eco/Green product, all natural, totally harmless. I have used it on several details with excellent results. Slickness is beyond what I have experienced with any QD. More along the lines of a spray wax.
The reason for this type of product is when water use is restricted, or just not available/practical it will meet the needs of most. Of course one should use common sense when using any non traditional type wash method. But so far so good, and its a keeper.